I was up at Paine Field tonight (Home of Boeing's Everett Plant), and noticed 4 777's. Two of which, have been there a few weeks, and are at Tramco, with all the engines removed, fairly typical to have 1-2 in here at a time. But, the other two, were sitting on the tarmac opposite Tramco, just as if they had been parked there. I got three tail numbers N224UA, N225UA, N226UA, but was unable to see the last one. Now, it's possible that all of them just happened to be for service at the same time, but, it does seem sorta odd, as if maybe UA is "storing" them up here. I don't think these were awaiting delivery from Boeing, as they were not on the usuall Boeing property, but rather airport tarmac, usually occupied by any military aircraft, such as the B-52 sitting up there. Any thoughts?